Tweezers.



F. GUNDORPH.

TWEEZBRS.

' APPLICATION FILED 0OT.27, 1910. 1,004,871 Patented Oct. 3, 1911.

j m d M90 y Pu co wnsumm'ow n c II if FERDINAND GUNDORPH, 0F PORTLAND,OREGON.

TWEEZERS.

Specification of Letters Patent.

Patented Oct. 3, 1911.

Application filed October 27, 1910. Serial No. 589,333.

To all whom it may concern:

Be it known that I, FERDINAND GUN- DORPI-I, a citizen of the UnitedStates of America, and a resident of Portland, Multnomah county, Oregon,have invented certain new and useful Improvements in Tweezers, of whichthe following is a speci fication.

This invention relates to tweezers and has for its objects to improveupon the construction of tweezers as there are commonly found in theart, with a view, primarily, of obtain ing greater strength and rigidityso as to en able the operator to use the tweezers with a firm grip, thusfacilitating the work. This is of particular advantage in the trade ofthe jeweler and watchmaker, though, of course, a pair of tweezersconstructed according to this invention and as illustrated in theaccompanying drawing is not limited in its use to any particular trade,nor is its detailed construction limited to the one depicted in thedrawing.

In this latter Figure 1 is a side view of a pair of tweezers embodyingmy invention. Fig. 2 is a plan view. Fig. 3 is an enlarged detail viewof the hinge, and Fig. 4 is an enlarged detail view of the spring andadj acent parts.

In the several views the reference characters 5 and 6 represent the twotweezer jaws ending in the usual nipper points 7, 7. The jaws aresecured together by means of a screw 8 which passes through an aperture9 in the jaw 5 and is screwed into the other jaw 6 as shown. The head 10of the screw is enlarged to form a shoulder 11 which overlaps the freeend 12 of the spring 13. The latter engages the screw under the head asshown. The spring is integral with the jaw 5 which latter is cut out orthinned as at 14: to form the spring.

It will be observed that the end 12 of the spring is the only part ofthe jaw 5 which is directly secured to the jaw 6. By this arrangementgreater resiliency combined with strength is obtained. Further it willbe noted that the slits 15 between which the spring is formed form acontinuation of the aperture 9.

The jaws are pivoted one upon the other in the following manner. 16, 16represent pivot points in the form of pins forced into the jaw 6 andhaving the conical shaped pivot heads 17 entering corresponding sockets18 in the jaw 5. As is clearly shown in Fig. 3 the action of the springforces the jaws apart, and as the latter are closed, the one jaw 5 rocksupon the said pivot heads 17. This results in a very light action at thepivot and at the same time the jaws may be made very rigid as shown. Inthe usual form of tweezers the jaws are necessarily light and springyand generally taper continuously from the pivot to the nipper points. Itshould also be observed that only the nipper points contact when thejaws are closed because the pivot heads prevent the inner surfaces ofthe jaws from contacting as is clearly understood from Fig. 4. Hence themost minute articles may be gripped firmly, yet gently, as the entiregripping force is exerted at the nipper points.

In order to obtain the best possible hinge or pivot action, the free endof the heads17 should preferably be on a level with the shoulder 11 onthe screw 8. To prevent lateral displacement there is provided a guidingpin 19 in the one jaw adapted to enter a guiding opening 20 in the otherjaw.

The above described construction possesses several advantages, viz.strength, great resiliency, easy action and low cost of manufacture.

I claim 1. A pair of tweezers comprising a pair of jaws, a spring formedintegral with the one jaw, and a screw and pivot points carried by theother jaw for securing the aws together and for pivoting the said firstnamed jaw to the other one.

2. A pair of tweezers comprising a pair of jaws, a screw in engagementwith the one jaw, and a spring formed in the other jaw and engagingunder the head of the said screw for normally keeping the said jawsapart.

3. A pair of tweezers comprising a pair of jaws, a screw inserted in theone jaw, a spring formed in the other jaw and engaging under the head ofthe said screw for normally keeping the said jaws apart and means forpivoting the one jaw upon the other.

4;. A pair of tweezers comprising a pair of jaws, a screw having a headfor securing the one jaw to the other, and pivot points for pivoting theone jaw upon the other, the extreme ends of the said pivot points beingin substantially the same plane as the under side of the said screwhead.

5. A pair of tweezers comprising a pair of jaws, means for securing theone jaw to the other, said means being carried by said other jawintermediate its ends, and a spring engaging said means for normally 10keeping the jaws apart.

Signed at New York, N. Y. this 26 day of October 1910.

FERDINAND GUND ORPH.

Vitnesses E. VAN ZANDT, IVAN KoNIosBERo.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

